Portion of a shoe outsole



FIG. 1 is a perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a plan view thereof; and,

FIG. 3 is a rear perspective view thereof.

The broken line showings of the boundary of the claimed and the remainder of the shoe form no part of the claimed design. 

The ornamental design for a portion of a shoe outsole, as shown and described. 